A worker died Friday after falling from the scaffolding being built at a Taiwanese steel mill in central Vietnam, the third fatal construction accident at the trouble-embattled plant this year.

Tran Van Nghi, 21, plunged from the 15-meter-high scaffolding at the Formosa plant in Ha Tinh Province on Friday morning, local authorities said Saturday.

Nghi was rushed to a local hospital but he succumbed to severe injuries, they said.

Dang Hoai Son, chief of police in Ha Tinh’s Ky Anh Town, where the plant is located, told Thanh Nien that investigations into the cause of accident have been underway.

Last April, Tran Huu Dung, a 26-year-old construction worker, died immediately after falling from another scaffolding at the plant, invested by Taiwan’s Formosa Plastics Group.

A month earlier, a scaffolding collapse at the same site killed 13 construction workers and injured 29 others.

Following investigations showed that the accident had been caused by the failure of the scaffolding’s hydraulic lifting system.

In 2014 Formosa, which employed nearly 5,700 Chinese workers among its 40,000 workforce, became a target of anti-China violence triggered by China's illegal deployment of an oil rig in Vietnamese waters on May 2.

Rioters torched, looted, and vandalized the construction site on May 14.

It left three Chinese workers dead and 149 others, both Chinese and Vietnamese, injured.